A DeKalb County police officer was accused Thursday of showing a 13-year-old pornography and trying to undress her ... [Manuel] Williams, 49, admitted to the charges and offered his resignation, DeKalb County Police Chief Cedric Alexander said Wednesday ... “The accused allowed the victim to view pornography with him, kissed her on the neck, touched her” and tried to undress her, Jason said. The alleged incident took place at Williams’ home in September 2012, police said.​